Curious about what (stream.sys driver-based applications) is .

-Article ID: 3054476 - Last Review: May 19, 2015 - Revision: 1.0
May 2015 update for stream.sys driver-based applications in Windows 7 or Windows Server 2008 R2.

This update helps Microsoft improve the experiences when users run stream.sys driver-based applications in Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1, such as the performance and the quality improvements.

https://support.microsoft.com/fr-fr/kb/3054476/en-us

Could be for Windows Media based Application, webcams (not entirely sure) ect...Got it too today's evening.

Thanks for the link.

From my understand the driver specifies the interface class GUID to register adapters in the PIO Mode or DMA Mode and put them in their proper group/range of peripherals, performs routine stream request block.
Looks stream.sys belongs to DVD decoder and USB Camera group and has something to do with Microsoft Direct Show.

Steven284 said:

I found a few place yet nothing informative - then I found a place that explains the application where you use the test for W.E.I. Windows Experience Index that would benefit from this update.

Welcome to Sevenforums,

It would be kind if you have that link, so we can read about too.

Edit: Ohhh...that was here that place , sorry....

Ah, ok..you're running W.E.I right now?

I had no probs with WEI lately, but might run it too. Keep us in touch.

"helps Microsoft improve the experiences when users run stream.sys driver-based applications in Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1, such as the performance and the quality improvements."

Might be also for improvements of the streaming quality of the adapters plugged...


Edit: Ran WEI

7573052 (8600) - winsat\logging.cpp:0815: --- START 2015\5\20 20:10:19 ---
7573052 (8600) - winsat\main.cpp:4301: Command Line = "C:\Windows\system32\winsat.exe" formal -restart clean -cancelevent 174c9a01-a6be-4e1a-a92f-8351e01328ec
7573052 (8600) - winsat\processwinsaterror.cpp:0095: ERROR: tried to read resource strings, unknown exception occured
7573052 (8600) - winsat\main.cpp:4474: > IsFormal=TRUE IsMoobe=FALSE.
7573084 (8600) - winsat\main.cpp:4585: Watch dog system enabled
7573084 (8600) - winsat\main.cpp:4600: Main watch dog timer set to 600.0 seconds
7573396 (8600) - winsat\main.cpp:2490: > DWM Running.
7573692 (8600) - winsat\main.cpp:2497: > turning off DWM.
7573692 (8600) - winsat\main.cpp:2470: > EMD service will be restored on exit.
7573708 (8600) - winsat\syspowertools.cpp:0983: > Read the active power scheme as '8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c'
7573708 (8600) - winsat\main.cpp:2793: > power policy saved.
7573723 (8600) - winsat\syspowertools.cpp:1015: > Set the active power scheme to 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c'
7573723 (8600) - winsat\main.cpp:2814: > power policy set to maximum.
7574534 (8600) - winsat\logging.cpp:1763: ERROR: pahse enter/leave imballance
7574534 (8600) - winsat\main.cpp:0948: > IsOfficial=TRUE IsFormal=TRUE IsMoobe=FALSE RanOverTs=FALSE RanOnbatteries=FALSE
7574534 (8600) - winsat\main.cpp:1775: > Run Assessment features
7574628 (8600) - winsat\main.cpp:1775: > Run Assessment dwm -aname DWM -time 10 -fbc 10 -disp off -normalw 12 -width 1280 -height 1024 -winwidth C(1144) -winheight C(915) -rendertotex 6 -rtdelta 3 -nolock
7585923 (8600) - winsat\processresults.cpp:4018: > Wrote video memory bandwidth to the registry 54658200
7585923 (8600) - winsat\main.cpp:2037: > DWM Assessment results processing SUCCESS
7585923 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -aname Batch -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 300 -batchcnt C(10) -objs C(26) -rendertotex 6 -rtdelta 3 -texpobj C(1)
7591897 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -aname Alpha -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 300 -batchcnt C(75) -objs C(26) -rendertotex 6 -rtdelta 3 -texpobj C(1)
7597638 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -aname Tex -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 500 -batchcnt C(125) -objs C(20) -noalpha -texshader -totaltex 10 -texpobj C(4) -rendertotex 6 -rtdelta 3
7603535 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -aname ALU -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 500 -batchcnt C(125) -objs C(20) -noalpha -alushader -totaltex 10 -texpobj C(1) -rendertotex 6 -rtdelta 3
7609416 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname Batch -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 300 -batchcnt C(10) -objs C(26) -rendertotex 6 -rtdelta 3 -texpobj C(1)
7615282 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname Alpha -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 300 -batchcnt C(75) -objs C(26) -rendertotex 6 -rtdelta 3 -texpobj C(1)
7621054 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname Tex -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 500 -batchcnt C(125) -objs C(20) -noalpha -texshader -totaltex 10 -texpobj C(4) -rendertotex 6 -rtdelta 3
7627107 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname ALU -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 500 -batchcnt C(125) -objs C(20) -noalpha -alushader -totaltex 10 -texpobj C(1) -rendertotex 6 -rtdelta 3
7633066 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname GeomF4 -time 7 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 150;200;241 -batchcnt C(50);C(200);C(300) -objs C(12);C(26);C(45) -noalpha -geomf4shader -texpobj C(0) -rendertotex 6 -rtdelta 3 -tierframes 60 -tiertime 1
7641022 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname GeomV8 -time 7 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 75;100;120 -batchcnt C(25);C(100);C(150) -objs C(8);C(17);C(29) -noalpha -geomv8shader -texpobj C(0) -rendertotex 6 -rtdelta 3 -tierframes 60 -tiertime 1
7648963 (8600) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname CBuffer -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 75 -batchcnt C(25) -objs C(8) -rendertotex 6 -rtdelta 3 -texpobj C(1) -cbuffershader -cbufa 2 -cbuff 5 -cbufp 6
7654594 (8600) - winsat\main.cpp:1775: > Run Assessment mfmedia -input C:\Windows\Performance\WinSAT\winsat.wmv -nopmp
7656076 (8600) - winsat\main.cpp:1775: > Run Assessment mediaex -input C:\Windows\Performance\WinSAT\Clip_1080_5sec_MPEG2_HD_15mbps.mpg -dshow -video offscreen -audio mute -width 100%m -height 100%m -constrain -savereg -autoprofname -expfrmmin 270 -expfrmmax 300 -overrideframetype int2fps
7662238 (8600) - winsat\main.cpp:1775: > Run Assessment mediaex -input C:\Windows\Performance\WinSAT\Clip_1080_5sec_VC1_15mbps.wmv -video offscreen -audio mute -width 100%m -height 100%m -constrain -savereg -autoprofname -expfrmmin 135 -expfrmmax 150 -overrideframetype prog
7668119 (8600) - winsat\main.cpp:1775: > Run Assessment mediaex -input C:\Windows\Performance\WinSAT\Clip_480i_5sec_6mbps_new.mpg -dshow -video offscreen -audio mute -width 100%m -height 100%m -constrain -savereg -autoprofname -expfrmmin 270 -expfrmmax 300 -overrideframetype int2fps
7674625 (8600) - winsat\main.cpp:1775: > Run Assessment mediaex -input C:\Windows\Performance\WinSAT\Clip_480p_5sec_6mbps_new.mpg -dshow -video offscreen -audio mute -width 100%m -height 100%m -constrain -savereg -autoprofname -expfrmmin 135 -expfrmmax 150 -overrideframetype prog
7681021 (8600) - winsat\main.cpp:1775: > Run Assessment mediaex -input C:\Windows\Performance\WinSAT\Clip_1080_5sec_10mbps_h264.mp4 -video offscreen -audio mute -width 100%m -height 100%m -constrain -savereg -autoprofname -expfrmmin 135 -expfrmmax 150 -overrideframetype prog
7686964 (8600) - winsat\main.cpp:1775: > Run Assessment mediaex -input C:\Windows\Performance\WinSAT\Clip_480_5sec_6mbps_h264.mp4 -video offscreen -audio mute -width 100%m -height 100%m -constrain -savereg -autoprofname -expfrmmin 270 -expfrmmax 300 -overrideframetype int2fps
7692690 (8600) - winsat\main.cpp:1775: > Run Assessment media -input C:\Windows\Performance\WinSAT\winsatencode.wmv -encode C:\Windows\Performance\WinSAT\winsat.prx
7694874 (8600) - winsat\main.cpp:1775: > Run Assessment moobego
7694874 (8600) - winsat\main.cpp:1775: > Run Assessment cpu -encryption -up
7704951 (8600) - winsat\main.cpp:1775: > Run Assessment cpu -compression -up
7714998 (8600) - winsat\main.cpp:1775: > Run Assessment cpu -encryption2 -up
7718024 (8600) - winsat\main.cpp:1775: > Run Assessment cpu -compression2 -up
7728039 (8600) - winsat\main.cpp:1775: > Run Assessment cpu -encryption
7738195 (8600) - winsat\main.cpp:1775: > Run Assessment cpu -compression
7748413 (8600) - winsat\main.cpp:1775: > Run Assessment cpu -encryption2
7751627 (8600) - winsat\main.cpp:1775: > Run Assessment cpu -compression2
7761751 (8600) - winsat\main.cpp:1775: > Run Assessment mem
7766899 (8600) - winsat\main.cpp:1775: > Run Assessment disk -seq -read -n 0
7773139 (8600) - winsat\main.cpp:1775: > Run Assessment disk -ran -read -n 0
7783326 (8600) - winsat\main.cpp:1775: > Run Assessment disk -scen 2009 -drive C:
7837630 (8600) - winsat\processresults.cpp:4018: > Wrote video memory bandwidth to the registry 54658200
7837661 (8600) - winsat\processresults.cpp:0962: > Wrote cpu expression compression score to the registry 365
7837661 (8600) - winsat\processresults.cpp:1004: Total physical mem available to the OS : 15,8 Go (17 047 502 848 bytes)
7837661 (8600) - winsat\processresults.cpp:1253: Skipping StdDefPlayback limit check.
7837661 (8600) - winsat\processresults.cpp:1265: Skipping StdDefPlayback limit check.
7837661 (8600) - winsat\processresults.cpp:1480: > Wrote disk score to the registry 590
7837661 (8600) - winsat\processresults.cpp:1498: > Wrote random read disk score to the registry 1658
7837677 (8600) - winsat\main.cpp:0948: > IsOfficial=TRUE IsFormal=TRUE IsMoobe=FALSE RanOverTs=FALSE RanOnbatteries=FALSE
7837786 (8600) - winsat\processresults.cpp:4018: > Wrote video memory bandwidth to the registry 54658200
7837802 (8600) - winsat\processresults.cpp:0962: > Wrote cpu expression compression score to the registry 365
7837802 (8600) - winsat\processresults.cpp:1004: Total physical mem available to the OS : 15,8 Go (17 047 502 848 bytes)
7837802 (8600) - winsat\processresults.cpp:1253: Skipping StdDefPlayback limit check.
7837802 (8600) - winsat\processresults.cpp:1265: Skipping StdDefPlayback limit check.
7837802 (8600) - winsat\processresults.cpp:1480: > Wrote disk score to the registry 590
7837802 (8600) - winsat\processresults.cpp:1498: > Wrote random read disk score to the registry 1658
7837833 (8600) - winsat\syspowertools.cpp:1015: > Set the active power scheme to 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c'
7837833 (8600) - winsat\main.cpp:2855: > Power state restored.
7837833 (8600) - winsat\main.cpp:2870: > Successfully reenabled EMD.
7837849 (8600) - winsat\main.cpp:2896: > Composition restarted
7837849 (8600) - winsat\watchdog.cpp:0311: Watch dog system shutdown
7837849 (8600) - winsat\main.cpp:4909: > exit value = 0.

Was you referring to the part of the log in Run Assessment mediaex input dshow, you're troubleshooting?

Might the update have restored something in registry keys for you. From what i read most of WEI troubleshooting is about power plan registry settings not set properly.

My log shows error at start because i've forced the High power plan to be the default setting.